Method of operating a load-modulated linearizer and arrangement therefor.

A method of operating a load-modulated linearizer is described for linearizing the output signal of a nonlinear power amplifier. The load-modulated linearizer comprises a first and second hybrid coupler and at least two control amplifiers, connected to different ports of the hybrid couplers. The at least two control power amplifiers are configured for providing an identical signal response in use. The first hybrid coupler comprises a control signal input and the second hybrid coupler comprises a linearization port for providing the linearized output signal. For performing the linearization the method comprises generating, by a signal generator, the control signal. This generating comprises receiving, at an input port of the signal generator, a main input signal to be amplified by the nonlinear power amplifier; and generating, by the signal generator, a mimicked output signal wherein the mimicked output signal is a representation of the output signal of the nonlinear power amplifier. The generating of the control signal further comprises generating, by the signal generator and based on the mimicked output signal, said control signal for the at least two control power amplifiers.